Metal mold



(ModeL) T. O. BENNETT.

METAL MOLD.

No. 325,043. Patented Aug. 25, 1885.

WITNESSES: 3 MENTOR: m 5 J 3 C O3a BY ATTORNEYS.

Nirnn ra'rns PATENT OFFICE.

THOMAS O. IZEHNETT, OF ATLANTIC MINE, MTCHTGAN.

METAL MOLD.

@PECIFEGATEON forming part of Letters Patent No. 325,043, dated August 25,1885.

Application filed February 9, 1885.

T 0 all whom it may concern:

Be it known that I, Tnonas O. BENNETT, of Atlantic Mine, in the county of Houghton and State of Michigan, have invented a new and useful Improvement in Metal Molds, of which the following is a full, clear, and exact description,

This invention relates to sectionall y c011- structed metal molds for casting various articles, and is applicable to such molds of differ ent construction and shape, according to the articles designed to be cast in them.

The invention consists of a mold with fixed sectional portions having beveled lips on their inner ends, and with yielding sections or pieces arranged to form a portion of the sides 01' the mold and free to yield laterally and lengthwise, with their inner ends beveled to fit the beveled lips of the fixed sectional portions, together with springs for forcing inward said yielding sections, substantially as hereinafter more fully set forth and claimed.

- For the convenience of illustration I shall here describe the invention as applied to a mold for making car-axle brasses or bearings, as such application will serve as well as any other to explain it, and, as compared with the ordinary mode of casting these brasses, said articles when made in the metal mold will be free from sand, skim, and dirt, of uniform size and shape, and require no boring or finishing after they are taken from the mold, thus econo mixing the production of the brasses.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a horizontal section, on the line a x in Fig. 2, of a metal mold for east ing car-brasses embodying my invention; Fig. 2, a vertical section of the same on the irregular line y y in Fig. 1, and Fig. 3 a side view of one of the yielding parts of one of the sec tions of the mold.

A is the bottom section of the mold, having a piece, A, which forms the core for the journal-bearing of the brass, secured to it by bolts 7) Z), passing through the bottom of the section; or the same may be fastened in any other suitable way.

The top of the mold is composed in part of tModel.)

two longitudinal sections, B B, and in part of separate pieces B B B", forming the ends and sides of the mold. Of these the end and central body-pieces, B B", are bolted, as at b b,

or otherwise firmly secured to the sections B B, while the other pieces, B", arranged between the end pieces, B, and central body-pieces, B and which serve to provide for the contraction of the casting in cooling, and leave spaces 0 for the metal of the casting between them and the end pieces, B, are separate and independ ent sliding pieccsthat is, they are free to move both laterally in direction of the length of the mold and transversely thereto-and may be guided or held in place by pins 1) on. the sides of the central body-pieces B next adjacent to them entering oblong apertures c in the yielding sectional pieces B. These yielding sectional pieces B" are forced inward toward the center of the mold by springs s, of any suitable description, and are constructed on their inner ends with side bevels, c, which bear against correspondingly-beveled lips f on the inner ends of the sides of the central bodypicces B next adjacent to them. By means of these bevels and beveled lips of the sectional pieces or slides B are spread laterally by the springs s, to occupy their full space in the mold before the casting is made.

After the metal has been poured in, which may be done through an end gate or hole, at, the contraction of the casting in cooling will cause the yielding pieces or slides-B to be drawn toward the central body-pieces, 13*, and to be forced back or outward in direction of their length without fully opening or breaking the joint at their inner ends, and relieving the casting of all strain, and allowing the mold to be easily opened, the casting removed, and the mold closed again readily for a sac cceding casting. The action of the parts whereby the mold is relieved of such strain will be more fully apparent when the fact is taken into consideration that the metal contracts longitudinally a. (2., from each end toward the center of the castingthe effect of which contraction would tend to weaken or break off the metal in the spaces 0, or to cause it to bind too closely therein, but for the yielding action of the sections The lower section, A, and upper sections,

escape of any gas that may form in the mold when making the casting.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a sectionally-constructed metal mold for making castings, the combination, with fixed sectional portions of the mold having beveled lips on their inner ends, of yielding sections or pieces arranged to form a portion of the sides of the mold and free to slide laterally and lengthwise, with their inner ends beveled to fit the beveled lips of the fixed sectional portions, and springs for forcing inward said yielding sections, essentially as described. 2. In sectionally-constructed metal molds for making hollow or recessed castings, the section A, with its attached core A, in combination with the section B, the fixed end and central body portions, B B the latter having beveled lips f on their inner ends, and the sliding and connected yielding sections or pieces B having bevels (2, made to fit the beveled lipsf, and provided with springs for forcing them inward, substantially as specified.

THOMAS O. BENNETT.

Witnesses:

SAMUEL TRENBATII, JAMES HoGnn. 

